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Old 11-22-10, 08:16 PM   #1
phantomcow2
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Method of undetermined coefficients

Is anybody familiar with the method of undetermined coefficients?

I'm trying to solve a second order linear differential equation of the form

y(t) = 2t + e^t.

Would a good guess for a general form of a solution be At+Be^t?
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Old 11-22-10, 10:34 PM   #2
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Easy there Einstein jr.That same mathmatical theory caused an unstable reaction to blow up the crapper in the womens dorm at Harvard.
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Old 11-22-10, 11:05 PM   #3
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What on earth are you doing?! Thinking is out right.

The students here are off all week... which leaves us staffers with a nice, quiet campus all week.
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Old 11-22-10, 11:07 PM   #4
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Where are A and B mysteriously appearing from?
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Old 11-24-10, 05:37 PM   #5
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Old 11-24-10, 05:54 PM   #6
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Quote:
Originally Posted by bigbenaugust View Post
What on earth are you doing?! Thinking is out right.

The students here are off all week... which leaves us staffers with a nice, quiet campus all week.
Ha, today is my first day of thanksgiving break and I had a quiz on this stuff just yesterday.

For all those who are curious, At+Be^t? is a good choice.
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